:root {
  --color-blueish-white: #edf0fb;
  --color-deep-blue: #081235;
  --color-deep-blue-opacity: rgba(0, 10, 40, 1);
  --color-digital-blue: #1b31ff;
  --color-bright-green: #a7ff71;
  --color-border: #89A;
  --color-warm-purple: #9c73f3;
}

* {
  font-family: Montserrat, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background-color: var(--color-deep-blue);
  color: var(--color-blueish-white);
  margin: 0;
  padding: 0;
}

body {
  align-items: center;
  display: grid;
  gap: 15px;
  grid-template-rows: auto 80px;
  margin: 0;
  min-height: 100dvh;
  padding: 0;
  text-align: center;
}

svg {
  background-color: var(--color-deep-blue);
  fill: var(--color-blueish-white);
}

button {
  background-color: transparent;
  border: none;
  color: var(--color-blueish-white);
}

#countdown-button {
  position: fixed;
  left: 10px;
  top: 10px;
  height: 50px;
  opacity: 0;
  transition: opacity .25s;
  width: 50px;
}

#countdown-button.show {
  display: block;
}

#toggle-menu {
  position: fixed;
  right: 10px;
  top: 10px;
  height: 50px;
  width: 50px;
}

#countdown {
  font-size: 60px;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 100px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -2px;
}

#buchstabe {
  height: calc(100dvh - 100px);
  font-size: 150px;
  font-weight: bold;
}
#buchstabe.started {
  font-size: 200px;
}

#used {
  margin: 0 0 20px;
  padding: 0 15px;
}

aside {
  /* background-color: rgba(255, 255, 255, 0.1); */
  bottom: -100dvh;
  display: flex;
  align-items: flex-end;
  left: 0;
  height: 100dvh;
  position: fixed;
  transition: bottom 0.25s ease-out;
  right: 0;
}

hr {
  border: none;
  background-color: var(--color-border);
  height: 1px;
  margin: 20px 0 30px;
  width: 100%;
}

.show-menu aside {
  bottom: 0;
}

form {
  background-color: var(--color-deep-blue-opacity);
  border-top: 1px solid var(--color-border);
  padding: 15px;
}

aside label {
  font-size: 22px;
}

aside button {
  background-color: var(--color-digital-blue);
  border-radius: 4px;
  font-size: 20px;
  height: 50px;
  min-width: 50px;
}

aside button.active,
aside button.disabled {
  background-color: var(--color-bright-green);
  color: var(--color-deep-blue);
  position: relative;
}

aside button::after {
  background-color: var(--color-deep-blue);;
  content: '';
  display: block;
  height: 2px;
  left: 0;
  opacity: .5;
  position: absolute;
  top: 50px;
  transform: rotate(-45deg);
  transition: 0.25s ease-out;
  width: 0;
}

aside button.disabled::after {
  left: -9px;
  top: 24px;
  width: 68px;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 40px;
}

label {
  display: flex;
  margin-bottom: 20px;
}